Steam-superheater.



PATENTED MAY 5, 1903. M. MARQUARDT & E. HUFFNER.

STEAM SUPERHEATER.

APPLICATION rum) APR. 12, 1902.

F I QQQ ms: NORRIS warns cc snow-urns WASHINGTON. a c.

x0 110mm.

Patented May 5, 1903.

UNirEn STATES PATENT OFFICE.

MAX MARQUARDT AND EMIL HQFFNER, OF DRESDEN, GERMANY.

STEAIVI-S'UPERHEATJER.I.

SPECIFICATION forming part of Letters Patent No. 727,400, dated May 5, 1903.

Application filed April 12, 1902- $erial No. (N0 model-i To all whom, it may concern:

Be it known that we, MAX MARQUARDT, re-

siding at 31 Ohristianstrasse, and EMIL HGFF- NER, residing at 3 Ludwig-Richterstrasse, Dresden, in the Kingdom of Saxony and Empire of Germany, subjects of the King of Saxony, have invented new and useful Improvements Relating to Steam-Superheaters, of which the following is a'specification. Ourinvention relates to steam-superheaters, and comprises an arrangement in connection with the generator whereby the radiating heat of the fire will be utilized and the action of too high temperatures upon the superheater-tubes will be precluded without red ucing their effectiveness.

The invention consists substantiallyin providing the generator in front with a chamber in the upper part of which the superheater is built, so that the heat radiated by the fire will reach the same. I

In the accompanying drawings we have shown the boiler of a portable engine com-' prising this improved arrangement.

Figure 1 is a longitudinalsection through V the fire-box and the front chamber. 7 Fig. 2

is partly a transverse section through the chamber and partly a front elevation.

To the front walla of the boiler is attached a chamber 0, partly lined with refractory material b. This chamber, which is closed in front by a door (1 and terminates at the rear in the fire-box or furnace, is covered up by the bottom platefof the superheater-chamber, wherein the superheater-tubes g are socured, the lower part it of which may be rear- Wardly inclined, as shown. Above the aforesaid bottom platef of the superheater are arranged in the well-known manner the two steam-chambers h t, to one of which the fresh steam is admitted, while the other delivers the superheatedsteam.

In the front chamber 0 may be provided a slide or flap m, which is raised, more particularly when firing the boiler, to exclude the tubes from the action of too great a heat. By this slide or flap the Stoker is enabled without the exercise of special attention to admit heat to the superheater-tubes or to shut it 0% from them, according to exigencies.

What we claim as our invention, and desire to secure by Letters Patent, is-- 1. The combination with a steam-boiler furnace having a chamber in front of its tire-box, i

and throughwhich the fuel'is introduced, ofa superheater within said chamber out of the path of t he furnace-gases and exposed to the radiated heat from the fire, substantially as de- "scribed.

the fire-box, substantially as described.

3. 'The combination withasteam-boiler furnace having a chamber in front of its firebox, of a superheater located in said chamber between the furnace-door and grate-bars to one side of the path of the entering fuel and out ofthepath of the furnace-gases, and exposed at its inner end to the radiated heat from thefire-box.

4:- The combination With a steam-boilerfurnace having achamber exterior to its firebox, of a superheater in said chamber and having its inner end without the fire-box and out of the path of the furnace-gases, but exposed tothe radiated heat therefrom, substantially as described.

'5." The combination with asteam-boilerfuv nace, and a superheater having its inner end without the fire-box and out of the path of the furnace-gases, but exposed to the radiated heat therefrom, of a movable shield or flap to cover said superheater, and exclude the same from too great heat, substantially as described.

6. The combination withasteam-boilerfurnace, having afuel-inlet chamber, between its door and fire-box and open at the top, of a superheater mounted in said top opening with its lower end exposed to the radiated heat from the fire-box, substantially as described.

7. The combination with a steam-boiler furnace, having a fuel-inlet chamber between its door and fire-box, and open at the top, of a superheater, closing the said open top and comprising inlet and outlet chambers, and a series of looped or 'U-shape tubes, connected at theirends to the respective steam-chambers and exposed at their bends to the radiated heat from the fire-box, substantially as described.

8. The combination withasteam-boilerfurnace having a fuel-inlet chamber between the door and fire-box, and open at the top, of a superheater closing said top, and having de- 10 pending U-shape tubes inclined at their bends at- K to receive the radiated heat from the firebox.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

MAX MARQUARDT. EMIL HOFFNER.

Witnesses: HERNANDO DE 8010,

PAUL AREAS. 

